Its not as good as this but Gokusen is similar to this! The FL is very good at fighting and its also a romcom manga. The plot was so good I even considered to buy the manga!
Nisekoi is also an option
Mehhh nisejoi is not an option
*nisekoi
Kaguya-sama: love is war, is pretty amazing
Just watched an anime the most similar to this and its Love after world domination. Trust me, I got cringed out at the start but if you push through2-3 eps you will like it
Y'all this is probably the funniest RomCom I've ever read. I still have yet to find romcoms that live up to this level